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Illustration of a Embraer 175LR. Not a photo of N121SY.
Illustration of the Embraer 175LR, not a photo of N121SY.

N121SY 2014 Embraer 175LR

Serial number 17000430. Registered to Skywest Airlines Inc, St. George, UT, US.

  • 2014Built
  • 88Seats
  • 2,200 nmRange
  • 450 ktCruise
  • 41,000 ftCeiling

SPECIFICATIONS

Embraer 175LR specs

Published figures for the type, from public sources. A given aircraft varies with its completion, weight and mods.

Model
Embraer 175LR
Year
2014
Serial number
17000430
Engines
2 × GE CF34-8E5
Thrust
14,510 lbf each
Seats
Up to 88
Range
2,200 nm
Cruise
450 ktas
Published Mach
0.76
Ceiling
41,000 ft
Fuel capacity
3,071 US gal
ICAO type
E75L
Exterior
White

THE AIRCRAFT’S LIFE

N121SY, from delivery to today.

Registration events from FAA records, compiled November 2025. Maintenance, damage and component history live in the logbooks, not the registry.

  1. Embraer / manufacturer

    Built (2014) and delivered to SkyWest in October 2014. (delivery month recorded by operator/spotting sources)

    FAA registry
  2. Skywest Airlines Inc

    FAA certificate issued; aircraft registered to SKYWEST AIRLINES INC.

    FAA registry
  3. Skywest Airlines Inc

    Airworthiness certificate date recorded.

    FAA registry
  4. Skywest Airlines Inc

    Registry last action date (administrative update) recorded.

    FAA registry

FAA REGISTRATION

Registration details

Registration
N121SY
Status
Current as of November 2025
Certificate issued
Oct 9, 2014
Airworthiness date
Oct 10, 2014
Last FAA action
Mar 24, 2023
Registration expires
Oct 31, 2027
Mode S code (hex)
A05910
Aircraft category
Fixed-wing multi-engine
Weight class
Over 20,000lbs

From FAA registry data as of November 2025. Check the FAA registry for the current record.

OWNERSHIP

Registered owner

Skywest Airlines Inc

Corporation · St. George, UT, US

ESTIMATED VALUE

What N121SY might be worth

No estimate on record

Value depends on total time, engine program, damage history and the completeness of the logbooks.

Open the aircraft value tool

EQUIPMENT AND HISTORY

As reported in public sources

Cabin
United Express 76-seat (C12Y64) typical configuration: 12 business, 64 economy (airline fit); registry certification seating 88.

Listings and registries are not the logbooks. A pre-buy confirms equipment, program status and damage history from the records themselves.

RESEARCH NOTES

About N121SY

Compiled with AI assistance from the public sources listed below, November 2025. Not checked against the aircraft's logbooks.

Overview

This entry covers airframe N121SY, an Embraer 175LR (ERJ-170-200LR) built in 2014 with manufacturer serial number 17000430. The aircraft is owned by Skywest Airlines Inc, a corporate owner located in St. George, UT, US, and is certificated on the US registry. Owned and operated within the SkyWest fleet and based out of St. George, Utah, the airframe’s type certification supports an airline-fit seating arrangement while the registry lists a higher certification limit. Notable registry detail for this specific airframe is the recorded certification seating of 88, while operator cabin fit is commonly recorded as a United Express 76-seat layout; valuation and condition specifics for this individual airframe are Not published.

Operations & Cabin

The aircraft is typically operated in a regional airline role under SkyWest’s operations; the common airline fit for the type on this airframe is a United Express 76-seat layout (C12Y64), configured as 12 business and 64 economy seats, while registry certification permits seating up to 88. Mission profiles for this airframe center on short- to medium-range regional routes within a 2,200 nm capability and cruise dispatch at approximately 450 kts, serving point-to-point scheduled services and high-frequency regional sectors. Maintenance considerations follow Embraer and GE CF34-8E5 program schedules typical of commercial regional fleets, with operator base support in St. George, Utah, for line maintenance and scheduled checks.

Model & Market Context

The Embraer 175LR occupies a performance niche as a larger regional jet in the E-Jet family, offering extended-range capability and a higher seat count relative to smaller regional types. It competes with similar regional jets in airline fleet planning where carriers seek a balance of passenger capacity and range for thin- to medium-density routes. Buyer and resale demand for the type reflect airline network needs for 70-90 seat class aircraft, and maintenance or resale considerations for this airframe incorporate the GE CF34-8E5 engine maintenance track and the aircraft’s 2014 build year and registry condition.

MOVEMENTS

Last reported flights

DateFromTo
KIAH George Bush Intercontinental Airport KCOS Colorado Springs Airport
KLIT Bill and Hillary Clinton National Airport KIAH George Bush Intercontinental Airport
KDEN Denver International Airport KLIT Bill and Hillary Clinton National Airport
KABQ Albuquerque International Sunport KDEN Denver International Airport
KDEN Denver International Airport KABQ Albuquerque International Sunport
KDSM Des Moines International Airport KDEN Denver International Airport

Public ADS-B and spotter reports up to November 2025. Not a live track.

SOURCES

Where this page comes from

Built from FAA registry records, manufacturer specifications, and public flight-tracking and market data, compiled November 2025. Values come from Radar’s aircraft value model. Owners and operators can ask for a correction or removal.

BUYING, SELLING OR FINANCING

What to check before a deal